Why is an audio limiter necessary for FM broadcasting?

In any sound broadcasting system, an audio limiter is essential to prevent over-modulation and ensure the station stays within legal FM deviation limits while maintaining a constant 100% modulation for a 'loud' and professional sound.

What are the pre-emphasis options on the Veronica limiter?

The Veronica Audio Limiter features selectable pre-emphasis settings of 50uS, 75uS, or none (linear), making it compatible with broadcasting standards in Europe, the Americas, and worldwide.

Can the limiter handle high-level studio audio inputs?

Yes, the circuit is designed to handle massive audio inputs up to +24dBu (12Vrms), ensuring clean processing without distortion even from professional studio consoles.

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The Original and Genuine Veronica® Audio Limiter

Technical Specifications

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Processing Type	Peak Limiting with AGC Action
Signal-to-Noise Ratio	-75 dBu (Very Low Noise)
Frequency Response	30Hz - 15KHz (Broadcast Standard)
Nominal Output	Standard 0dBu (775 mV rms)
Attack Time	Fast Peak Response (< 1 mS)
Total Harmonic Distortion	0.2% at full limiting
Selectable Pre-emphasis	50uS / 75uS / Off
Visual Monitoring	3-LED Compression Level Indication
Maximum Audio Input	Up to +24dBu (12V rms)
Power Requirement	11 - 16V DC (Single Supply)

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Massive Input Handling

Engineered for precision, the Veronica® circuit manages audio gain via three individual time constants. This advanced configuration delivers a transparent Automatic Gain Control (AGC) paired with a lightning-fast attack time to catch aggressive signal peaks. Whether your input is at -6dBu or as high as +24dBu, the audio compression and output levels remain rock-solid and constant. Additionally, the module features built-in, selectable Pre-emphasis (50uS/75uS) to ensure global transmission compatibility.

Audio Optimised to 100%

In professional FM broadcasting, precise audio management is essential to prevent over-modulation and ensure regulatory compliance while delivering a high-density, 'loud' signature sound.

The Original Veronica® / Aareff Audio Limiter is meticulously engineered to achieve a constant 100% modulation level, eliminating the need for listener volume adjustments and providing a polished, transparent output for both music and speech. By combining smooth AGC with rapid peak limiting, this system ensures your station maintains maximum signal presence and professional audio quality without ever exceeding legal FM deviation limits. NOTE: STEREO REQUIRES TWO UNITS

Who Can Benefit from the Veronica® Audio Limiter?

User Category	Primary Benefit & Application
Professional FM Broadcasters	Stations requiring a constant, optimized 100% modulation level and guaranteed compliance with legal deviation limits.
Community & Educational Radio	Perfect for small-to-medium stations needing a "set-and-forget" solution that maintains high-quality audio across various music and speech inputs.
Low-Power FM (LPFM) Operators	DIY enthusiasts using the Veronica® kits who want to add a professional, polished sound to their broadcast output.
Studio Engineers	Anyone managing audio inputs up to +24dBu who needs fast peak limiting (better than 1mS attack time) and selectable pre-emphasis (50uS/75uS).